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Onyx Brief

The archive, declassified. Pure white page, pure-black ink and a solid black strike, one phosphor green for the machine's verdict, and a rare oxblood audit seal. Austere, premium, high-contrast.

Signature · the star
primary accentOnyx · #0a0a0b
Phosphor · #0a8f4f
Bright Phosphor · #12c46b
Neutrals · the ground
bg
#ffffff
surface
#ffffff
text
#0a0a0b
muted
#6e6e74
border
transparent
Semantic · functional accessory
success
warning
error
info
Download .cssmonochromephosphorhigh-contrastarchiveeditorial
Do
  • · Keep the page pure white and the ink pure black.
  • · Use phosphor only as the verdict / live value.
  • · Keep oxblood rare and procedural.
  • · Separate by shadow and the strike, never colour edges.
Don't
  • · Use beige/cream grounds.
  • · Add gradients or a third bright accent.
  • · Set small phosphor text on white without black support.
try it

remix with this palette

Drop Onyx Brief onto any UI language and swap the art style — the preview recolors live.

UI language
Palette · fixed
Onyx Brief
Art style
Landing Page
live preview · recolored + filled